package com.ypj.filter;

import com.ypj.domain.User;

import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

public class SystemFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request=(HttpServletRequest) servletRequest;
        HttpServletResponse response=(HttpServletResponse) servletResponse;
        User user=(User) request.getSession().getAttribute("user");
        if (user==null){
            response.sendRedirect("/error.jsp");
        }else{
            filterChain.doFilter(request,response);
        }
    }

    @Override
    public void destroy() {

    }
}
